#include<stdio.h>
int main02()
{
	int i, j, n = 0;
	for(i = 1;i <= 4;i++)
		for (j = 1;j <= 5;j++, n++)
		{
			if (n % 5 == 0)printf("\n");
			if (i == 3 && j == 1)break;
			printf("%d\t", i * j);
		}
	printf("\n");
	return 0;
}